CSO principal clarinetist Larry Combs, like many of his colleagues, is a jazz aficionado, so it's only natural that he invited a crossover clarinetist to play with his group the Chicago Chamber Musicians. Eddie Daniels, who has a master's degree from the Juilliard, is one of those rare instrumentalists who possess both classical technique and a jazz sensibility--a combination Combs resignedly admits he lacks. At this season opener Daniels and Combs will team up for Poulenc's rarely heard 1918 Sonata for Two Clarinets, in which a B-flat clarinet jostles for attention with one in A; its spiky rhythms and sharp contrasts in tempo rather resemble Stravinsky's Rossignol. Daniels then solos in Weber's mellifluous Clarinet Quintet, which has become one of his signature pieces (he recorded it for the Reference label). The all-star lineup in the program's third entry, Mozart's Wind Serenade in C Minor, includes the two clarinetists along with CCM (and CSO) members Michael Henoch (oboe), Gail Williams (horn), and Bradley Opland (double bass), and guests Daniel Gingrich (also a CSO hornist) and Judith Zunamon Lewis (oboe). Noteworthy, too, is the group's free series at the Chicago Cultural Center, which takes place the first Monday of every month; this season it'll offer the entire Beethoven violin-piano sonata cycle. Sunday, 7:30 PM, Pick-Staiger Concert Hall, Northwestern University, 1977 South Campus Dr., Evanston. Monday, 7:30 PM, concert hall, DePaul University, 800 W. Belden. 342-5226.